Classification Keys

Each rock type can follow only one pathway of the rock cycle.

• True
• False

Lee uses a microscope during science class. He sees this organism in a drop of water. Which organism did he most likely see?

• paramecium
• euglena
• amoeba
• vorticella

Based on the mineral identification table, which mineral belongs in square X of the flow chart?

• mica
• graphite
• magnetite
• hornblende

 Pumice is formed when lava from a volcano cools. Which rock type is pumice?

• igneous
• metamorphic
• sedimentary

Based on the information in the table, the best way to tell gold from pyrite is by which property?

• color
• transparency
• luster
• hardness

A student observes a mineral that is colorless and harder than glass. Based on the chart, which mineral is the student observing?

• quartz
• garnet
• feldspar